Not sure if 101 riffs is the way to go - though its useful later. First learn the structure of the blues

Type in the following 12 bar in BIAB


C7,C7,C7,C7,
F7,F7,C7,C7
G7,G7 ,C7, C7
Set tempo choose style etc...

This is the simplest blues form possible so its a trifle dull, but never the less you need to digest it.

Then you can tweak it like this:

In order of preference...

In the 10th bar use F7 instead of G7
In the last bar use G7
In the second bar use F7


you can use some or all of these variations and there are more, but this is the basics of the twelve bar form - the most common.

Take Dominant 7th chord patterns and work them over this pattern. Try voicing them in different ways (change note order around but use the same notes). Get a basic pattern such as a triad figure going in the left and put down some chord patterns in the right. Do this until you gain felxibility in your ideas.
Learn the blues scale (Root, b3rd, fourth, #fourth, fifth, flat 7, octave.and create your own, mainly right hand, riffs using blues scale fragments

When you get some way with this start learning the different blues styles. Tim RIchards has a very good book to help with this, but dont just read the notes from the page, ingest the ideas. Then tackle licks 101 you will be ready for it.

Take everything through all keys especially the open strings on the guitar EADGB, and C .

Zero

Once you get the idea of it it becomes fun as well as hard work

Win 11 64, Asus Rog Strix z390 mobo, 64 gig RAM, 8700k