It's pretty easy overall. There are tons of types of grafts, but if you line up the cambium layers, stick it together well and seal it well, it should work.

The dozens of techniques and styles of grafting are just different ways of ensuring more cambium layer connection between the root and scion.

I did banana, saddle, and whip and tongue last week. Saddle was unbelievably easy. There is a tool on amazon for around 40US that cuts the saddle shape.

I searched on the amazon.ca and these were the identical brand I used. US amazon link with manufacturer name and model

It will cut a little u shape on the graft stem and you cut the same on the root stock. It will match perfectly and hold strong while you wrap it.

If you are grafting vegetative species then its even easier, just Cut diagonally through the stem with a razor stick them together and tape it up.

Plants like tomatos, peppers, eggplant, and potatoes can all be grafted together this way with a pocket knife and a little clip. Or different color roses onto the same bush.Or you graft cucumber roots onto melon stock etc etc.

What are you wanting to graft?

It might be easier to learn how to graft that specific thing than to learn grafting overall. It's really all about practice and technique, and most species have a tested most effective method. The science of it is pretty automatic, as long as the cultivars are compatible that is.

Now to spring is some of the best time to do grafting, as the sap is rising from the roots and things are starting to wake up, typically.

You should also look up cuttings and asexual propagation, those are super fun and now is a good time to get into it as well.