Learning how to play a trumpet by myself. Advice please?

I would like to learn how to play a trumpet. I was in a band before ( I played the tenor horn for 5 years, Trumpet and french horn for a few months.) but it was during the 2008 - 2013 period. Is it possible for me to be self taught? I tried playing today as I bought a trumpet already. I was able to play (C scale,... show more I would like to learn how to play a trumpet. I was in a band before ( I played the tenor horn for 5 years, Trumpet and french horn for a few months.) but it was during the 2008 - 2013 period. Is it possible for me to be self taught? I tried playing today as I bought a trumpet already. I was able to play (C scale, Do to La. For Ti and Do i struggled abit.)

I can't really recall playing the trumpet and french horn but i still remember how to play the tenor horn.

Thank you for your advice and have a nice day!
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