Fallout 1 & 2 are absolutely phenomenal classic games, but they are very old school (they’re 90’s releases, after all) so you have to be up for that. Not just graphically, but game design too. If you’re okay with that, they’re really worthwhile experiences, and I might even prefer Fallout 2 over unmodded New Vegas.
As is usually the case with games from this era, look for the unofficial patch and the Restoration Project, too.