Firstly, welcome to the forum.
The truthful answer is that it will probably be a struggle - but by no means impossible. Employers will generally have to carry a greater excess for a v. young driver.
If, however, you can afford to do the training and not work in that field immediately, go for it. Don’t go into debt for it whatever you do. Training costs are unlikely to be lower as you get older. Some employers count “experience” from the date of your licence so it can work nicely in your favour in a couple of years or so.
We regularly train 18/19 year olds with huge success. I will be honest and say that many are working for family so the way in is a bit easier. A young lady of 18 passed with us yesterday on artic with one driving fault. She will now be taken off her 17 plate 8 wheeler and will be driving a handsome artic. But Dad owns the firm.
If you’re going to do it, go into it with your eyes open. And be prepared for many knock-backs - at the same time persisting until an opportunity comes your way.
All the best, Pete 