Any advice 😩 SAHM with 5 month old and 2 year old who doesn’t speak

I feel very overwhelmed and worried. My son will be 2 next month. He says “No no no” when he doesn’t want something. If we say “Ready, set.....” he will say “Go!” I’ve got him to say “ball” a couple times. And that’s pretty much it. He has his own sounds for “Bye” and “I love you”. He’s very smart and social and happy and energetic but he just cannot understand words. He is very well behaved except he throws tantrums when I have to make him do something he doesn’t want or take something away - I feel guilty disciplining those tantrums because I feel awful that he doesn’t understand WHY I’m doing those things and can’t express his wants or needs.

I also have a 5 month old and I’m alone 12 hours a day with them. I feel so guilty that I can’t give my all and dedicate my time to his speech. I know he gets a lot of screen time, but I just need something to occupy his attention for longer periods while I’m dealing with the baby and i stress about if that’s something that’s hurting his development. He is a human tornado lol I love his energy and spunk but it makes it very hard for me to take him places and chase after him with my 5 month old.

He sees a “speech therapist” once a week for an hour and I feel like it’s not helping.

I’m at a loss. I just don’t know what to do for him and his speech. And then because he doesn’t understand what I’m saying nor express how he’s feeling - discipline makes me feel so guilty. Like a should I even be disciplining his behavior when I know it’s just because he’s frustrated and not because he’s being bad? I love him so much and want the best for him and I feel like I’m failing and so lost.

ANY ADVICE PLEASE 💗💗💗💗