I played the series before a lot of times and also played Rise when it was relatively new, but I paused for over a year and started a completely new save on the PC version recently so I can tell you exactly how my experience was for someone who forgot absolutely everything about the game.
In short, it was brutal, you would think me playing the games before would help a lot but oh boy did that mean nothing when you pause for over a year. I felt like I literally never played a video game before, I felt like a nooby casual player getting into this game again. The controls feel horrendous like you need 12 fingers to control everything. You have no idea how anything works in this game and despite it trying to teach you with tutorial stuff and in-game menus, you have to look up YouTube guides or you just can't figure out how exactly a class is meant to be used.
Starting this game is really brutal and hard, you will feel so incredibly lost, but if you stick to it you will get into it. I almost quit my current playthrough because I thought I wouldn't, but a few more hours later and you will get the hang out of it when you focus to one class and then it will be incredibly fun to play and progress.
I do find it hard to test out different classes tho, because the game is so deep, I'm basically scared trying to get into another class and learning completely different mechanics all over again, so I just didn't so far, but maybe that works better for you.
You will also get to the first credits of the game relatively fast, but these credits are basically the credits for the tutorial, I would say the real game starts after that but not even that is true, the real game starts 10-15 hours after that once you reach high rank, that's your goal and I just reached that yesterday again, finally. It takes a while getting to that and it can start to feel repetitive for a few hours before you reach it, cause you're simply grinding through the village hunts, but once you're there, the real game of upgrading, grinding, crafting and hunting begins. Before that, don't try to focus too much on upgrading stuff and crafting armor. Try to get to high rank without wasting too many monster resources. The reason is, once you're getting to high rank, you will unlock the same list of armor you unlocked before all over again, just with better stats, so if you focus too much on low rank gear, the fun of unlocking new and fresh looking armor gets completely lost. I get why people say don't use the free overpowered gear, but still, I think most would agree to not craft or upgrade too many low rank things either.
Oh and look up YouTube guides of course, all the stuff from Arekkz Gaming is incredibly helpful.