The very best of luck in your application for the role of WSOp or indeed Commissioned Aircrew if you decide otherwise.
I'm a currently serving Junior Technician (TG1) with over 11.5 years of experience under my belt and I to am currently applying for WSOp. I have successfully passed the Aptitude and Filter Interview stages and I am just waiting on the OASC's decision in when they are going to board me. Nonetheless, the preparation on both a physical and mental level that I am putting myself through at the moment is nothing short of intense especially when I'm trying to fit it around my professional and family life.
However, the prize on successful completion of the myriad of hoops set up before I or any other applicant to jump through is more than worth it. It's going to be tough considering the current Fiscal environment but you can never have too much prep!
Good Luck!