I can recommend Pentel art brush or pocket brush if you're just starting out. The thing with brush is you're gonna use a lot of ink to practice and that means spending a lot of money on cartridges.
My favorite to use is a waterbrush pen loaded with fountain pen ink, I love seeing how the ink flows.
It's nice to try the Tombow / fude brush pen markers and I can easily use one pen in one week and I also hate throwing things away that often, so I opted for the ones that are refillable. Refills can be expensive too so I thought of just using a water brush pen, I've also used printer inks as cheaper alternative (this may eventually clogg the brush but I've been using mine for almost 2 years).
Here's a rough sample of what I have, done in same style and medium pressure. I'm by no means an expert, feel free to ask any questions.
