im new and need help

i have tried everything. then one day i got up and something clicked in my brain. it was summer so all i did was workout. i did but an hour then i did a a belly dance then i went swimming. my life was consumed. then i went back to school. started to gain and forgot how mch a lost. it was hard and now i gain just as much as before. i really want to feel good and be healthy. i don know how this site works. so if there is anyone who wants to help me and be my pal i would be extremely happy