Those solder joints will be functionally sound, so from that perspective they are fine.
If you want to improve, I would recommend using less solder on the switch leads. IMO, the one two from the left is the best. You typically want that concave look. If it's bulging, you could use less solder for a cleaner joint. If you had really dull looking bulges that didn't connect well with the PCB, they would be cold solder joints. Those are what you definitely want to avoid, and should fix immediately. In every case I can think of, too much solder isn't necessarily *bad*, it's just excessive.
Also, it's hard to get a good look at the diode joints, but they look like they could maybe use more solder. Perhaps someone can weigh in further. I think they will perform fine, but it would probably be a better joint with more solder, IMO.
That sounds rather critical, but for a new solderer, these are pretty good. You will learn as you go on and improve, but these are solid.
And now CPTBadAss has responded that F6 and F7 might be cold. I can see why they might be, but I think they could also be just excessive solder.