First purchase help - Speedmaster

New to this sub and new to buying a watch at this price point. Excited but also slightly anxious! I have always wanted a speedmaster and have the opportunity to buy a second hand one from 2021 with a sapphire sandwich (ref 311.30.42.30.01.006) for 5k euro. In very good condition from a reputable store.

Was wondering what the general consensus is about the watch here. Worth the investment as a first watch? And if so, what do I need to watch out for when buying it? There is so much info that I'm getting lost a bit.