Claw = use the side of your left index finger to control the d-pad camera. Left thumb still on stick to move, and your middle finger takes over the shoulder button. For the record, the claw isn't really a fond memory (to me at least), even if it's a funny one.

If it were me, I'd just remap the right joystick to the d-pad so you can spare your fingers the pain!

Do you have other MH experience?

Longsword was a lot simpler in Unite so that's a good medium-weight weapon that you can dodge easily with.

Sword n shield is very beginner friendly for its item usage while wield (very important while learning how to paintball consistently or learn the timing windows for healing)

Hammer is great for learning because it has more low-commitment attack options than other slow weapons while you learn your openings

Not the person you asked, and I'm speaking from World experience, but my favorite weapon is the Gunlance. A good mix of defense, slashing, and concussion, so you can break pretty much whatever you want. All around fun, since it felt like I could really push the monsters, rather than feeling like I was constantly on defense.

Sword and Shield was also really fun. Good combos and a decent all-rounder. I also enjoyed Bow.

Try out several on the same monster (one whose moveset you've memorized), and see what feels nicest. I actually played all weapons, because certain monsters were easier to fight with particular weapons.

Lastly, find YouTube videos that explain how to use the weapons and suggest common or useful combos. Good luck!