You should learn about the different editions to D&D if thats what you're interested. 3.5 is a little mathy but it has a solid following as it wasn't a bad edition but not one I recommend for new players. Pathfinder while not a D&D brand edition is in lame man terms 3.75 edition D&D it was made by Paizo instead of Wizards of the Coast and it fixes some errors in 3.5 edition but remains a little mathy. 4th edition is the mmo version of D&D in the sense that they went from super mathy equations to using more skills akin to an mmorpg's skills. And the skills were split into at-will, encounter, and daily powers depending on how often you could use them. Sorta like their cooldown. While pretty easy to pick up for someone who has a strong video game background especially mmorpgs it is the least liked edition since the video game aspects felt too forced and clunky and it also ruined one of the most loved campaign settings, The Forgotten Realms. 5th edition is the most current version of D&D. It goes away from the video game feel of 4th edition and goes back to the more math types of 3.5 and older versions while also keeping the math simple. They also added more skills to the classes to make them feel unique and added a way to add a background to your character by rolling dice without you having to write one up yourself. In fact these backgrounds also affect in what types of skills your character is good at. Like if they're a noble they are good at persuasion having spent their life living in the royal court. And are good at history due to having a better education than the common folk. They also reworked the magic system so its easier to do the damage calculations compared to 3.5/pathfinder and didn't completely screw it over like they did in 4e. I'd recommend 5e for sure since its fairy easy to pick up and its actually pretty popular. I recommend watching videos from DawnforgedCast on youtube on how to create a 5e character. He has a video for each class and one on multiclassing. Anyway welcome to the world of table-top RPG. You can also check out the video games too. Most of them like the Baldur's Gate, Icewind dale, and Neverwinter Nights series are a solid adaption of their respective edition and good ways to learn basics like how the classes work and how stats tie into different things. Theres no 5e game yet but they did announce that one is going to be released later this year.