As a veteran programmer who half the lifetime practised coding in BASIC and experimenting with writing games for nearly 40 years, I have worked with "poke" and "peek" years ago.  But I warn you - manipulating bits to do custom font work with poke in font memory is tricky!  The manipulated bits in the data bytes to assign to the TIC-80 memory addresses starting at 14604 in hexadecimal works the 8 binary digits in a byte from  left to right: bit 1 is on the left and bit 7 is on the right.