Cafe Under Gst

Dear sir mera ek Cafe hai jisme mai bahut sari services provide karata hu aur bahut sare birth income caste certificate ke saath paise transfer karne ka bhi kaam karta hu mera transaction zyada ho Raha hai kyuki mai paise transfer bhi karata hu to Sir mai Gst le sakta hu aur agar mai gst registration leta hu to kis rate se tax pay karunga paise ke transactions se future me koi problem na ho to iska kya solution hai please help me