Some who have learned Finnish words from Sulkasiipi seem to be serious about learning Finnish and would want to learn grammar as well. I wish to contribute to their studies a little bit. Finnish has a complicated grammar, but you got to start somewhere – e.g. here.
The good news is that the endings presented in this video apply to all verbs, only 3.person singular is slightly irregular. The root changes, however, are numerous; this is just a small fraction of the variety.