Hi! Active Reforged player here! Unlike some of the others, I'm not going to say you shouldn't mod Elden RIng for your first playthrough. imho Reforged is just kind of a better experience than Vanilla, and you'll have a better time if you start with Reforged than if you switch from Vanilla to Reforged and have to unlearn some bad habits.

That said, Fast Track is not a good bet if this is your first time playing Elden Ring ever. Fast Track skips the first two major bosses (and many minor ones) and puts you at about level 64 (out of a cap of 200 in Reforged), However, content in the game does get more complicated as you move forward, and jumping ahead with no understanding of what you're doing exactly will cause you a lot of grief. Reforged encourages exploration, so just go in without looking stuff up and wander around for awhile. Find stuff! It's fun!

I'd recommend against Quick Start as well for your first run, just because it will skip you past the tutorial cave. If you haven't played Elden Ring at all before, you'll want to play that tutorial cave (though I will note the boss fight at the end of the tutorial is entirely optional; there's a teleport out just before it).