Look in the Newbie Forum under “A Quick Start Guide To Manual Exercises”, it should be among the first threads. It contains a video on jelq to show the proper way. You don’t mention what you use to wet jelq with. Shampoo or conditoner or soap are not good to use at all. Vaseline from a jar or baby oil are used my many guys. If you are using the proper lubricates then I don’t know about why you are getting blisters, I haven’t had that trouble.
There are many exercises,but some of them are advanced and are not to be done by newbies because of the risk of injury until the dick gets more conditioned. I don’t know how much you’ve read here about PE—it’s wise to read and learn thoroughly in the Newbie Forum and to use the search engine when seeking out many details. Be safe and good luck on your gains.