It looks like your writing your assembly using the Intel x86 syntax, its dense but try cross referencing your code you write with the intel x86 assembly manual. They obviously won't have all the examples you will need but generally they are pretty good starting reference. I would also depending on your OS get a debugger that you can step through your code to see if your program flow makes sense and help troubleshoot the errors your getting more effectively. Its tedious but so is writing in assembly. I used GDB with GEF for pretty print and some overlays. Hope this helps.