I don’t know if there are any salon based apprenticeship schemes open to mature students so you might need to consider attending college to gain your level 2 (& level 3) qualifications.
Although the courses are advertised as full-time study, they usually only require attendance for a couple of days a week so contact all your local training providers to find out what’s available, costs and attendance requirements. You might be able to attend a course and continue working on a part time basis around the course. Not all courses are the same in terms of what they offer, fees charged and attendance requirements so it’s worth contacting all the training schools within a reasonable travelling distance.
Realistically, you might struggle to get taken on by a salon at your age unless you have additional skills that they can utilise such as book keeping, reception work, marketing etc. as they can employ school leavers on much less than minimum wage.
Finally, some colleges suggest that you can get a job with just the level 2 qualification, but it’s a tough market to break into without considerable experience and further training. Colour correction and advanced cutting techniques are taught on level 3 so ideally, you need to factor that into your future training plans.
I completed my level 3 then did some additional training at the Sassoon Academy plus numerous short courses (inc. Barbering) to give me an edge when applying to salons for work. From my level 2 course intake only 2 other students are working as hairdressers so you need to have a plan and stay focussed.
Best of luck!