20 % is OK starting out. add in more raises, first IP, mostly with hands that play OK vs a three bet. Depends a lot of short stacks at the table as well, they sometimes force more limping.
I find FR softer over all - mostly even the 'good' players are just nits who are easy to "read" since they just have the nuts and/or AA. Almost all of the guys who can hand read and raise/3 bet a lot play 6 max instead.
Since you will have more people in the pot, the pot size will usually mean you can commit on the flop or turn rather than having a PSB+ left on the end. easier for new players. for same reason being OOP is not as bad in FR.
All that also means big pairs play better - more players means someone has a lower set more often, getting the money in on flop/turn is good for sets, and you will almost never see a 3 bet and can usually limp in EP. If there is a 3 bet from a full stack you can probably call anyway because it's 100% AA, although usually don't cold call a 3 bet unless the table conditions are just right.
Watch the vids to get ideas on what hands are playable in LP when the pots aren't normally 4+ way, otherwise just focus on making or drawing to the nuts. Hwang's first book is great for full ring.