Over the years I have had the ability to learn from and be part of various mastermind groups (online and offline). Mastermind groups are beneficial in helping you reach exponential growth through the compounded efforts and ideas of those members who are in the group and helping each other.
Mathematically it is like 1+1= 11 instead of 2 as many ideas can be born from others in communicating or pointing out things the original person did not know were possible or have not tested yet.
One of the best books that shares this idea of the mastermind is the classic "Think and Grow Rich" by Napolean Hill, which I have listened to as well as read a couple times over the years and would highly recommend you doing as well.
Below you will find some of the groups and/0r memberships that I am part of and recommend you checking out. Some focus more on training in various aspects and others may focus more on the tools/software needed with the training involved to implement those tools to grow the business.
NOTE: I am a member and very likely an affiliate for many of these programs listed below. If there is a link present with a charge involved to join or even opting in with back end purchases, I would also likely earn an affiliate/partner commission.