You can place in the top 1k as a free player as well as reach the 51k mark, but its a lot harder just starting out. Each event has a different amount of favor towards older/paying players. EG its super important to have a high base sed and be active. Gambit you need to have a decent level so the temp stamina pots do more. Colo is pretty balanced as far as events go, 5 level 100s and your basically on par with everyone.

I'm pretty much pure f2p (did spend the free 500 gold on 5 egachas awhile ago) and I've only missed 3 event cards. First seg card, the top 100 one for a colo, and the first gambit's 50k reward. If you do decide to be a casual casher its pretty cost effective to buy the 1 daily egacha ticket for 100 gold.

Sadly i think starting out now your always going to be behind because of all the missed events/leveling time. Though if you enjoy the game I don't see a reason to quit.