I use Isboxer, it’s pretty noob friendly compared to software like Hotkeynet and such. Mirai’s videos on youtube (under the name Multiboxology) has literally anything you’d ever need. From set up to advanced. Plus there is an Isboxer discord with help and chat on hand and loads of people talking about their boxing plans. Also there is the dual-box forums which can have some helpful topics.
Lastly, there is a boxing guild forming on Herod Horde, over 30 members so far and they plan to raid and have all sorts of fun. Info is posted in the ISboxer discord for anyone interested.