Firstly welcome to the family mate, if you've been reading this for the past 6 months you probably already know what we are all going to say lol.
If you've been thinking about shaving for the past year, you're never going to shake the urge until you take the plunge and take it off, you know it is the right thing to do, so just do it mate!
If you take it all off right now, your confidence will start to increase, some people get an instant relief others take a bit of time, but that is why we recommend everyone follows the 30 day rule. It gives 30 days for you and your friends/family/co-workers to get used to the new better looking you. It also gives you time to perfect your new technique and routine. If you don't like it after the 30 days, within a week you will already be back to a zero guard buzz, there is always the option to grow out your hair, after 30 days though I doubt you will want to anyway

I'm 26 myself and been shaving my head for the past 5 months now, and I can tell you it is one of the best things I ever did, I feel so much more confident, and other then the first week where it was too cold to actually show my head off anyway, I've never hid my head under a cap again! I still wear them because I work outdoors, but it is only out of necessity rather then fear of people seeing my bald spots.
Do you have a beard trimmer or clippers on hand? if so, go grab them, some shaving cream/gel and your favourite razor and just go take it all off mate, it is really that simple because once you've made the first stroke there is no going back

If not first thing in the morning go visit your local barber/hairdresser and get them to buzz it all off with no guard, then if they offer the service, get them to give you the head shave, that way you can just sit back and enjoy the experience, take pictures, ask questions all that kind of thing. If they don't do shaves there, just come home and finish the deed.
It is time to take hold of your hair problem now, the sooner you do it the better.
Oh and don't worry about how silly, stupid, ugly, unattractive you will look because sly suits everyone! Its certainly that one hairstyle fits all kind of look and at the end of the day, that is all the sly look is, a hairstyle, it's not a prison sentence or a vow of chastity or anything like that, and with more guys going either BBN (bald by nature) or BBC (bald by choice) it is actually becoming a very popular hairstyle.
This is a bit of a long post, but I hope if gives you that push you need!