Is it worth buying a 318,320 or 325i for a first car?

So I really want to get a E30 320 or 325 but a 318 is obviously a cheaper option. Now for my situation and major question… is any of them worth buying for a first car my dad( been a mechanic had amazing cars) <- basically knows his sh@t. Says it’s just problemsnot reliable lots of maintenance and alotnof money spending on the car. He says I should go for something more modern like a fiesta or a focus. So I wanted to ask if they’re worth it or not like do they have a lot of maintenance issues? Is it worth considering as a first car? And how much would any of these be worth?