Hello, Psychology PhD student here.
I don't have too much to add, I just wanted to emphasise how competitive psychology is, and particularly clinical psychology. That is my aim as well, and I am doing a PhD to have a better chance at getting onto the DClinPsy afterwards. It is insanely competitive, and unless you are at Oxbridge or similar you will need a masters at least.
I'm not saying don't do it - I am doing it myself! What I am saying is make sure you really are passionate about clinical psychology before you make your decision - I would try to get some experience volunteering for the Samaritans or Mind. That will both boost your CV and give you more information as to whether you think the competition of clinical psychology is worth it.