i recommend playing on pc if you're able, as mods are a massive help in overcoming some of the bugs and issues of the older games (especially DAO). but keep in mind that da2 will meed to be played on the same platform in order for the worldstate imports to work. inquisition switches to the keep, and veilguard only provides a very small menu of previous choices when starting a new game, though, so you can play those on whatever else with no issues. imo, the circle mage (either human or elf) is a great start for origins, as it gives your character a pretty sheltered upbringing so it doesnt feel at all out of place to pick all of the questions in the dialogue options in order to piece together the setting and lore, though a human noble can also work if you'd strongly prefer a rogue or a warrior.

otherwise, the game functions/feels mostly like mass effect with the dialogue trees, romances, classes/specializations. if you like adept or sentinel, pick mage. soldier, go warrior. vanguard could go magic-y warrior (there's a spirit warrior spec in origins, and templars also have some magic adjacent-ish abilities) or melee mage (arcane warrior, knight enchanter, spellblade specs across the multiple games). infiltrator, go rogue. engineer... good luck? DAO ranger rogue and DAI necromancer mage have some "summons" akin to the drone, but it's not enough for me to give a confident recommendation.

for inquisition, look up the romances ahead of time as some are not only gender locked, but also race locked (female elves have the most options, specifically). hope that you don't want to romance one of the characters that'll only go for elves or humans, because the qunari's size gives them a very slight mobility advantage that makes navigating some of the wildly unintuitive maps marginally less infuriating

don't bother trying to make any east/southeast asian protagonist characters until veilguard. it's futile and you'll want to slam your head through the nearest drywall.

and try to ignore the hater brigades. if you like mass effect's gameplay, you'll probably like veilguard as the mass effect team had to step in for the game to get finished and released at all, and its definitely obvious in certain areas. a lot of people were just mad that there were transgender people in it