As I live in Germany, my product recommendations might not be as helpful for anyone outside the EU. I usually get something for sensitive skin by one of our two biggest drugstore chains, 'Rossmann' or 'dm'. They have their own brands which are basically the same stuff for both, just under different names. One is "sun ozon", the other is "sundance". Weird names, but both have a "sensitive skin SPF 50+ face fluid" that does the job. Sadly it isn't a 100% reef friendly sunscreen. Since it also is similar to other sunscreen in that it makes your skin shiny, this sucks for baldies if you don't want to blind everyone when the sun hits your dome. I usually combat this by applying the sunscreen together with a mattifying moisturizer (there are a lot of good ones for oily/combination skin).
Two general recommendations I can give though: one, avoid special "bald guys" cosmetics. Those are usually way more expensive than others and offer nothing more in return. Good face moisturizers are usually better. Two, witch hazel toners can really make a difference on your scalp. I feel like it helps to keep your skin smooth and bump-free and it will also help to close micro cuts from shaving.
As someone who suffers a receding hairline since he was 19 and is now 30, shaving my head at 20 was one of the best decisions of my life. It's mostly a confidence issue, as others have already stated. Look at some bald celebrities like Dwayne Johnson, Patrick Stewart, Jason Statham and so forth... They own their look and they look good. If it's only a temporary thing for you, know that hair will grow back soon.
How to deal with it?
In general: if it's only for treating a medical issue and therefore temporary, don't worry too much. You're so much more than just your hair! And hair will grow back with enough patience.