OK I'll try to help.

Here is a MIDI CC chart:

https://www.whippedcreamsounds.com/midi-cc-list/

When starting out don't try to use or learn all of the MIDI CC CC means Continuous Controller) as it will be very confusing. Start with the following:

CC7, CC2, CC11 = are all volume controls. If you use a wind controller you use CC2. For keyboard, bass, and guitar MIDI controllers use CC7 or CC11. Start with CC7 and once you get that down look up CC11: CC11 works in conjunction with CC7, but you don't need it to start.

CC1 - Mod wheel - its use is determined by whatever MIDI sound source you are using. Some MIDI sound sources use it as a volume controller. Others use it as a vibrato controller while some have specific parameters it controls.

CC10 - Pan will place and or move your sound from one side of the stereo spectrum to the other.

Pitch Bend - Pitch Bend will raise and lower the pitch of a given sound: the amount of change is determined by the sound source. Think of a horn player starting on a slightly lower pitch then rapidly moving to the correct pitch.

CC7, CC10, CC1 (Mod Wheel) and pitch bend are the ones to learn first.

Another thing to be aware of is Program Change, labeled PC. This will change the sound source to another sound, i.e. for instance a trumpet to a sax. If you are using a DAW you would probably put each instrument on a different track.

I will be glad to help you if you need further help.

PS - if this is redundant just let me know: I don't know exactly what you have already learned.

Whenever I get something stuck in the back of my throat, I dislodge it by drinking a beer.
It's called the Heineken Maneuver.

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware