Firstly welcome.
If there's a watch I'm thinking of buying I'll normally do a bit of research. Reviews tend to be mostly by sellers and positive, but if you can find someone who owns or has owned the same watch it's worth reaching out to them to see how their experience was. I also check out values on Chrono24 to see if the price I'm paying is competitive. For a particular watch I will also check out the seller, and if it's a vintage piece I may post asking what people think of the actual watch. I've avoided buying watches which with hindsight and expertise were obviously wronguns in this way.
I don't tend to ask for opinions as to whether I should buy a particular model - that's where knowing what you like comes in.