Unless you managed to claim Compelling Personal Reasons with Student Finance (which is possible, given the reasons why you left), you'll have to fund the entirety of first year yourself, with no access to SF, but beyond that you'll get normal SF.
Do be aware that you'll need lots of work experience (you're a bit non-specific about your previous NHS work - tea lady = bad, healthcare assistant = fantastic, for instance), a good UKCAT / BMAT score, a strong academic record (probably including recent study - you don't say when you dropped out, but if it wasn't recent enough, then they may want to see you do an Access course).
You can't just apply to Birmingham and expect to get in. You can apply to 4 unis for medicine, plus one in another subject. But, 60% of first time applicants receive four rejections, so you really do need to be prepared to move across the country for this.
If it doesn't work out for you, then do consider
- nursing - a very common option for mature students, offered in more than one Birmingham university, and because it's an NHS funded course it's not subject to the SF constraints that would make you fund first year yourself. This also applies to some other healthcare related courses.
- returning to your old uni course. Your old uni may be willing to take you back, or you may be able to get another uni to agree to take you directly into second year, which would allow you to dodge the SF issues.
The Student Room's medicine forum is quite good, though do be prepared for some slightly obsessive 17yo medicine applicants.