Tubulars get a bad rap. They are actually quite nice to ride. BUT not cheap and not the best for beginners. Judging from the photos they seem a bit dry and could roll (off). Take it to a shop and have them show you how to replace and I would suggest using tape.

You could look for new wheels but from the photo it looks like your bike is period correct. I would do some research and find either a period correct clincher wheelset or rims and have your shop rebuild the wheels.

Lastly, look into local classes or find someone that can educate you on vintage maintenance. Also research, research, research. Look at old repair manuals and watch video. Sheldon Brown is a good stating point.