I'd be concerned at your lack of experience. How long did you work as a legal executive?
If you are good at what you do, eventually you will be able to establish a client base as referrals bring in clients. However this is a long road. That is why it is sometimes a better idea to buy into an established practice with an established fee income.
Have you done the Law society course on setting up in practice? It is helpful.
Remember the cost of running a practice are substantial- besides the practising cert and insurance, you will have to have a good accounting system or package, may need training in that, CPD costs, telephone, broadband, electricity, stationery, banking fees and other set up costs including office equipment, and you need to pay your own auditors to do your law society accounting audit. You'd be lucky to set up a bare minimum office for 20,000 or 30,000 for the first year. Remember this does not include drawings for yourself or staff costs. So before you pay yourself anything you need to bring in 30,000 ( or if you are more extravagant in your set-up, whatever it costs you) in fee income in your first year. And it means that if you want to have a good income you need to get whatever income that is, on top of that.
Being a sole practitioner is hard work, work that never stops- you are constantly trying to bring in work, deal with the work you have and all the time deal with the difficult law society accounting requirements and every other management and practical problem that any office encounters. This is a long day, 7 days a week job.
Now as opposed to that, if you get an employed position, your salary is a given and life is much easier. If I were a young, newly qualified solicitor and I could get a job in this climate, I'd go for the job!