>>7734553
Just start with a sakura pigma micron. relatively cheap to pick up a starter set. You dont really need wide number of sizes. I wouldnt worry about the brush versions (pentel pocket brush can be nice, but some have defective bristles you need to trim/annoying if get shitty one, some sakura sets have 1 brush pen in it). You probaby end up using 001, 01, 03, 05 and maybe spot blacks with a brush or 1 (this is like marker thick kinda thing). Dont get caught up spending lots on nibs or gpens or watercolor brushes and ink. Just start with something simple like $10 pack of microns.
https://www.youtube.com/@RichardFriendartist - comic book artist/inker. go through his archives. used to post lots of tutorials on inking, tools, and videos on hatching like wrightson and franklin booth, etc like this https://www.youtube.com/watch?v=QJXCw9J9eFI
https://www.youtube.com/@stephentraversart - does lot of inking videos for landscapes and plein air type stuff. can see how he breaks down a photo or reference and how he builds the ink up into a full image.
https://www.youtube.com/@longstrideillustration - similar to travers with arti tutorials, but shows how to render like other famous artists and other inking tutorials like rocks https://www.youtube.com/watch?v=5KZATKZsRfc or grass https://www.youtube.com/watch?v=zZiopESzIAo&t=5s
try to do pen contorl exercises and focus on various lines and shapes like attached image. Just spend 10-15 mins doing these types of small blocks. focus on line quality. can fill block or go from light to darker/denser lines to create gradients, etc. look up zentangles. they are 'fun' little doodle exercises similar to these. can help with line control and weights to generate patterns and get used to using pen or whatever tool you go with.
once done, move to textures like the rock, grass, etc tutorials. dont do entire drawings. just make generic rock shapes and try to render it. do small squares of bushes and grass sections.