Racing roadkill
Guru
Gel saddles are good, on certain types of bike, for certain types of riding. The problem is, that using a gel saddle will hinder the process of toughening up your arse cheeks, in the long term, and if you end up doing any sort of distance, on a road bike, your glutes ( arse cheek muscles) will actually relax, which results in more discomfort. For a short commute / bimble type ride, on a bike with a more upright position, they are good.

... and you can expect your bum to be a bit sore if you haven't ridden in years. As others have said, leave the bike as-is for now and just get some more rides in. Your bum will toughen up the more regularly you ride, and once you've ridden regularly enough to know if the saddle is generally uncomfortable over longer distances, then is the time to look at a change of saddle (which can sometimes be more art than science).