i dont know what to do with my football future..

hello people, i do not know how to start this so i will start right away

I am a 16yo Goalkeeper from the czech republic, i am fat (182cm 108kg) but i am working hard to not be, i try to train almost everyday, with recovery ofc, i play 6th Czech league as a reserve goalkeeper but even when our goalkeeper gets hurt, my coaches would rather put someone onfield into goal instead of me, in my club we dont even hate GK trainings, lately with my friends contacts, i have the opportunity to go train with an academy of my town in the 1st czech league, but i am rly scared they will just make fun of me, i know i am capable of doing something with myself and i really want to go professional. i need to know what now, i have had a really dark past, and my only passions are football and god, so i dont know, do i have enough time? should i give up and just keep it a hobby?, thank you dear strangers..