What shall I do with my hair?!

I'm having a problem. My hair is horrible. It's in terrible condition from me bleaching and dying it. I'm going to sixth form in September and I feel my hair needs a change. Here are some photos of my previous hair styles... (some of these photos are really old by the way).

My natural hair colour... I think. This photo was taken about 3-4 years ago.

Next was my bleaching stage. Well, this killed my hair. Originally the underneath of my hair was black but then faded to brown. At the time I loved it, looking back I think it looks horrible on me!

   

Then I went red. The photo doesn't show how red I really was. It was like a rich red colour but in the light it looked bright red. The colour was beautiful but I didn't keep dying it as I knew i'd be going to sixth form and the sixth form i'm going to doesn't allow extreme hair styles/colours.

The most recent photo of me. Please excuse the makeup, was playing about recreating the Geordie Shore look for a laugh. As you can see my hair is not red anymore but has slight reddish tones. I haven't dyed my hair at all since I went red so the colour I have now is a mixture of faded red and platinum blonde.

Also, my hairstyle has stayed pretty consitent through the years. I have fine hair and hardly any of it. It's also naturally straight, so getting volume in my hair is a bit of a pain. It's also damaged from me bleaching my hair for a year.

What do you guys think? What should I do with my mop. As I already said, the sixth form I will be attending in September doesnt allow extreme hair styles or colours. Im stuck in hair hell!

Thank you for reading :)

P.S sorry for my lack of posts, I have more posts planned for the next few days!

Jess xx