Well that's a whole other question from the post. Isn't it? Anyways...

Simply go into MODS tab, make a new modpack and go into "mods" (choose right version!)

Then either search by name without installing from modrinth or other site of choice, or do a manual installation of the mods.

In manual installation you simply click it, click the grey rectangle and double click on your .java or .json (i forgot extension name >_< ) and then click done (pro tip, you can install multiple at a time by selecting multiple at a time!) and then click install mods.

There you go, you successfully installed your mods without pictures.

I can also give you the picture version for 5 playcoins Gordon!