hello Raven ,
when eventually you get your first renewal form, its very easy as mainly many questions are related to your health , but other wise its easy ,
so dont worry, as once you go through the questions one by one, and fill in the relevant answers itll be o.k, should you get it wrong all they will do is return it to you and mark what ever the question is that they want the answer to,
so once you get this form sit quietly and take your time filling in all the questions ,(you do have to include a two photos which you also send back to them , ) i think you have to sign on the back of the photo but the form will explain all this to you,
which you can get in a photographers, or better still one of those photo booths, where you can get your photo while you wait , so dont worry its all very straight forward, if your worried you can phone them ,.