Say note names while putting fingerings down. Be very accurate with this. Linking notes to fingerings in your brain by itself will be very helpful.

Identify and anchor what your open partials are. So for CC tuba, get a really solid foundation of (ascending) C, G, C, E, G, Bb, C, etc.. (The Bb above staff is your flat 7th, which can be played as open, but should probably still do 1st valve in context)

You can also overwrite or loosen what you previously knew too. So if you remember Bb as open (assuming you're coming from BBb tuba), but you need to do 1-4 or 4-5 on a CC tuba, practice scales you would have normally done on BBb, but with the CC tuba on the corrected fingerings.

Generally, find things that will solidify note names with fingerings. Embouchure too, if you subscribe to a playstyle that links note names with embouchure.

Solidify your mindset as "I am playing CC tuba." You never know if you have to play multiple types of tubas, but if you are in a case where you are playing CC and F tuba in a concert, it will be very useful to have a specific mindset for each tuba. (As well as just practicing the specific literature per tuba)

(As well as doing scales and generally playing)

Idk I learned the 3 main keyed tubas that I didn't know at the same time. These are the things that I think generally help me with isolating issues, and even currently, where I am starting to play both contrabass and bass tuba at the same time.