HELP❤ I don't know what birth control to use!!!

Emely
Hey ladies so in a week or so I'll be getting a birth control method other than condoms but I'm terribly afraid of weight gain. I want to get the arm implant nexplanon however I'm scared of gaining weight. Any advice comments or revelations? Btw ladies I'm a virgin and I'm 17 I'll probably be losing it next week or so I'll obviously use protection but my mom wants to put me on some sort of birth control and I don't think I could do the pill because I'm irregular when it comes to waking up or going to sleep. Anyways, what's the best birth control from your experiences??