First off they should really have an auto save function on this cause I had to retype all this a second time
step 1: download r2modman
https://enter-the-gungeon.thunderstore.io/package/ebkr/r2modman/
step 2: click on "r2modman Setup 3.1.34.exe"
step 3: extract all
step 4: extract
step 5: enter r2modman
step 6: set default profile for hard bullet to whatever you are using it on
step 7: enter hard bullet and create a profile (doesn't matter what it is just type h or something)
step 8: download all the mods you want
step 9: press start modded and enjoy

(extra tips so you don't look for problems for 7 hours after the mods don't load like me)
step 1: open file explorer and go to hard bullets main directory (where the game was downloaded to)
step 2: open r2modman and go to hard bullet
step 3: enter settings
step 4: press on "Browse Profile Menu"
(if you did it right so far you should have 2 file explorer tabs open)
step 5: drag everything from the "Browse Profile Menu" to the hard bullet main directory
step 6: press start modded and enjoy some mods
(everytime you download a new mod you'll have to do this again) (also if you want to delete a mod go to the main places like mods, userdata, and state and delete the files that have the mod name that you want to delete)