HR is for women, but if you can break into it good for you.
So is being an Administrative Assistant, for the most part.
HR is for women
There is no such thing as a job "for women" or "for men." Certainly not HR - I know plenty of guys in HR doing quite well for themselves.
Perhaps spend some time evaluating yourself and also spending time with a Career Guidance Counselor at the school you graduated from and/or your local university. You need to gather more info before you start planning out changes.
Short term, you could look to see about translating your paralegal experience into consulting roles.
Long term is harder. What do you enjoy? What are you good at?
Figure out which way you want to go before you take off running. Keep your day job for now ... and think hard about what you want to do with your life. Think about your aptitudes, your interests, your strengths, your weaknesses, and what kind of life you want to live. Then, figure out what you need to do to get where you want to go.
Read 48 Days to the Work You Love, by Dan Miller and Quitter by Jon Acuff.
Once you have a destination and a plan ... then you can figure out the right time to leave your current job. Now is not that time.
I get the impression from your use of the term "solicitor" that you live in the UK or some other Commonwealth country. I don't know what the legal education system over there is like. I was in a similar job to yours up until recently - started out answering the phone and making copies, eventually started doing more paralegal-type work, though I never got my paralegal certificate. Basically, I started working there because I thought I wanted to go to law school, realized I didn't, and ended up staying there too long because I couldn't figure out what to do next. I knew the job I was in had zero advancement opportunities and wasn't going to give me the means to live the life I want. So I took a leap, accepted a job in a different industry (IT) and a different state and here I am.
Unless you have a journalism degree from Columbia or Northwestern and a gold-plated resume with internships at top magazines and websites, journalism isn't going to happen. You can write and blog as much as you want, you'll just either be doing it on your own time or as an unpaid intern.
HR is a good field to be getting into. You should reach out to people in the industry and see if anyone would meet with you for 30 minutes to an hour to talk to you about what they do and how they got there. Again, it sounds like you aren't American and most of the people on this site are, so we probably can't offer much advice on the specifics beyond that.
This website might be of some help.
Why not keep the job to save money to pay for your own solicitor education / training?
"As for paying for training/education, unfortunately the only way to qualify is to do the postgraduate diploma (which I've done) then 2 years in a solicitors' firm as a trainee."
So this trainee period is like articling? I know a lot of people who took unpaid internships abroad in lieu of articling / the trainee period. They got invaluable international experience and made great connections. It added a lot of value to their resumes and it made them very attractive candidates once they returned home.