Your last session says little about the next
Before you pick a stake, know that the free spins can come early, late or not at all in a given session. No figure on this page tells you how often they land for you, and the result of one session is random whatever the RTP is. Two players with the same bet can finish far apart.
Choosing between RTP versions begins in the game rules, so read them before you stake. Which RTP version runs on this site is shown only there. The version named in the rules is the one in play, so check it each time you return.
Treat the maximum win as a ceiling, not a target you can plan a session around. It is reached very rarely, and no session is built to reach it. Use the top figure only to read the game's range, then set your budget for the time you want to spend.