This is the most comprehensive guide to masks and respirators I've seen fastlifehacks.com/n95-vs-ffp/
N95 (US standard) and FFP2 (European standard) respirators are scarce and expensive at present, but try and get a supply if you have to spend group time indoors, e.g. for work. In such settings these respirators give the wearer much greater protection than a surgical mask or a cloth mask.
The guide covers a range of practical Covid safety measures. Pretty much all you need to know in one place, worth bookmarking.