There are many very useful videos demonstrating how to do dovetails by hand on youtube. Some have slightly different techniques for the different steps (some requiring or using different tools), so you may want to look at several of these videos. You will then at least get a good idea for the general steps and what is important.
Personally, I like Matt Estlea's videos. His demonstration of how to make dovetails () is detailed and he shows possible alternative techniques and how to correct small errors.
As has been pointed out, practice makes perfect, so keep at it and maybe even make a few dovetails with scrap wood just as practice or start with a project that is not so important.
Good luck and have fun; it's really satisfying when the tails and pins fit together and there are no significant gaps
Personally, I like Matt Estlea's videos. His demonstration of how to make dovetails () is detailed and he shows possible alternative techniques and how to correct small errors.
As has been pointed out, practice makes perfect, so keep at it and maybe even make a few dovetails with scrap wood just as practice or start with a project that is not so important.
Good luck and have fun; it's really satisfying when the tails and pins fit together and there are no significant gaps