You wont get much info, if some people are crushing they wont come forward
Also i doubt many (if any) people have sample size on 1 stake to judge achievable winrate
If you want to take these games seriously, firstly look for rakeback, find an affiliate willing to part with at least 75% of their commission (could be hard if you are casual player), learn to multi-table to play highest rb missions for 8 hours etc
If you want to keep it casual, play 1$ or 5$ max, winning there pre rakeback (~20.65 chipev/game+) or with small rb% should be possible