As many others have said i your not happy and earning such little money, change now while you can, 25 is not too old. I'm an electrician and have just complete my C&G 2391 inspection and testing, which now allows me too sign off my own work. I'm 28 in August and decided at 22 that i really needed to get a carrer that would give me opportunities so i decieded to train as an electritian.
If you want any advice i'd be happy to help as i've just been through the whole college process over the last few years.
Just drop me a PM and ask away!!