Though I searched the forum, but I could not find any relevant information on how to record MIDI into BB.

This is what I aim to do:

Using my MIDI-enabled guitar, a Roland GI-20 together with a Roland UM-1, I want to input MIDI notes onto the melody or soloist track, saving time compared to entering notes by clicking on the relevant spot for each note.

I`ve seen it done on YouTube, but without any explanation on how.

I see input today, but there seems to be too much information recorded, so that playback is impossible.
I do want to be able to record bending notes (mostly when I write a trombone line) and vibrato for reed instruments and the flute.

Any tips?