All depends on what detail level oob you want, how much you're prepared to scratch build or correct parts on models, like rotor blade differences in some kits (I prefer doing kits oob as they are) and what scale you want.
I'd say a 1/48 Italeri kit #849, which was recently re-released as I understand it, would be a good starting point for a Vietnam era Huey, although it appears to be a completely unarmed version (I've checked photos of sprues and there are no weapons that I could see). Or for a later Huey their UH-1N, kit #2692, but that only comes with German weaponry, not US, although it does come with US Rescue decals.
I have the Academy 1/35 UH-1C and I can definitely attest to the fitment issues - to start with my cabin roof is warped, I've decided to cut both halves off the fuselage halves to see if I can join the two roof halves and make it level. Not sure it'll work though, probably the wrong thing to do... Then there is warping around where the two halves of the engine bay meet at the top where the exhaust pieces go, solvable whilst gluing the fuselage halves together but means holding the parts in place somehow while the poly cement dries. Then there are the quite poor imo M134 miniguns that come with it which have barrels made up of 3 parts!! Don't think I'd recommend it for a beginner at all.
As already mentioned definitely stay away from Revells 1/48 Huey Hog. They have a nerve to be still selling that kit. I made the error of buying one only to find it's very thin in terms of the plastic and in my case the fuselage halves are all warped at the front where the cabin is and will require substantial strengthening in and between the pillar areas to straighten the sides up to get a straight fit between the fuselage halves before/during assembly, if I ever get around to building it, I think. Probably be OK once the fuselage halves are joined and the interior is in but still quite a task for a beginner.