when do babies start crawling?

Oly • SAHM who loves movies, nerdy games, music and cooking
Since my baby was 4 months old he's been getting on all fours and I pick him up cause my house (and honestly myself) are just not ready for a crawling baby. But today he finally got those back legs moving (5months as of the 13th) I picked him up again. And I guess I'm just curious when everyone else's baby started crawling? Cause if this is kinda early then praise the lord I can still pretend he's my tiny newborn a little while longer but if everyone else's baby IS crawling then I guess I have to let go and stop holding him back 💔 so what's the norm for a baby to crawl?