Weight loss tips?

So last weekend, my husband and I took a trip to the beach & decided to bring my mother in law with us since she had nothing to do that weekend and was complaining about how no one takes her out or come visit her & whatnot. So we played it off and suggested we all go to the beach that weekend (which we were already going, just said it that way to make her feel special.. which lying is wrong, I know. And that’s why I deserved what she said to me!). She was excited & really grateful we made plans with her. So we went pick her up early that morning & took that long ride to the beach. I had on a nice little coverup that obviously did justice for my weight because it actually looked good on me and didn’t show how big I am. I lost 7 pounds (I know, it’s NOT a lot & it didn’t show on my body, just the scale) and I kinda felt proud of myself, being that I gained about 75 pounds in the past 3 1/2 years with this PCOS & have been having a hard time shaking it. So I wore a really cute 2 piece I saw in the store.. I knew I was still big, but I was feeling confident so I went for it anyway. So when we get to the beach and finish unloading everything, we went set up in an awesome spot not too far from the water. My husband and our son (not biological, he’s my stepson but I still refer to him as mine) took off towards the water.. they wasted no time 😂 So his mom & I were sitting under the umbrella on our chairs, talking a bit. And after about 20 minutes of talking with her, I saw how much stinking fun the boys were having so I started preparing myself to go play in the water with them. Y’all.. I took my coverup off and this woman’s mouth turned all the way upside down, like she had saw something so disgusting. I knew why she made the face but I pretended not to see her because everyone’s untitled to their own opinions & thoughts, plus she hadn’t said anything. So when my husband came to grab a drink in the cooler next to our spot, she told my husband “why’d you let your wife leave the house like that? She’s getting too big to wear stuff like that”... mind you, me & my stepson aren’t too far from them, so I can hear her clear as day. I was actually quite afraid others would hear her too, causing attention & them to look at me & probably judge me too. I looked around and saw not a single plus sizes girl wearing a 2 piece & knew I shouldn’t have either ☹️ I really wasn’t expecting any of this, I didn’t think it through thoroughly before throwing it on being that I found the swim suit last minute. My husband said something to her, but I can tell it was said aggressively. He was talking low and trying to get her to do the same but she’s naturally loud so she replied “I’m not being an asshole, I’m just saying she’s not small like she used to be to be wearing a bikini (it wasn’t even a bikini). I’m a big girl and I wouldn’t even attempt that” and laughed. He was very red when he turned around & headed back our way. By then, I was already tearing up so I quickly wiped my face & once he made it by us, I told him I’d be right back because I had to use the ladies room. He asked if I needed him to come with since it was a good distance from where we were positioned but I told him I was fine, and to stay with our son. I swiftly grabbed my coverup & towel & headed to the restrooms. It was soooo hard to fight back the tears as I walked there, thinking of what she said. I wasn’t boo hooing or crying out loud but the tears were rushing down nonstop. I got to the bathroom, and looked at my whole body in the long mirror and tried to convince myself that I didn’t not come to the beach to cry & be sad about a decision I made. I know, I was being extra sensitive & I had no clue why. I dried up my face & made sure it didn’t look as if I was crying. I put my coverup back on & came out the restroom feeling a bit better. My mother in law didn’t speak to me the rest of the trip though 😔 I didn’t mean to offend or embarrass her if that’s how she felt. I was just being spontaneous for once. But I know better for next time!! So my question to you guys is, what are some quick things you did to lose weight? I still need to lose abou 50 pounds, and due to this heat this summer.. I get overheated easily & will faint 😩 but I’ve been looking into gyms in our area so once I find one, that’ll be better. I’ve Been looking up detoxes that’ll help with my weight but I don’t know how well they work. I need some advice! By next summer, I want to have my body together so I’ll look better in any suit I decide to wear! I also just want better health altogether.

I should’ve took pictures for you guys to see how flattering I looked in my coverup vs me in the 2 piece without the coverup but after that, I avoided all pictures. I played photographer instead.