Well Jonny first of welcome to the forums!
A great place to start your journey is simply browsing/searching the forums here and then posting question as they arise. We have thousands of men (and quite a few women) here looking to increase their understanding and expertise in social interactions.
As for mentoring there are a couple routes to be taken. Many of the members who are on their journey at different points may be willing to do 1 on 1 coaching with you for free. These folks range from guys who just want to give a little back, to those who are trying to start out in the coaching business. Also on the site we have a few experienced members who coach professionally part-time and a few others such as our featured posters and myself who coach full-time.
So as you can see there are many options to help you on the journey to leading the life that you want to lead. Also if you decide to work with a mentor or not the board can give you access to the opinions of all the people listed above.
P.S. If you do decide that your interested in professional 1 on 1 coaching this
www.sq1coaching.com would give you an idea of my personal style.