KLS doesn't take students over 30, and it costs 115 000+€
I would say that you are quite old, and I would not recommend you to follow this path, sincerely.
If you are determined, the best thing you can start with is to get your initial medical class 1 exam. It is already quite difficult once you pass the 35 mark (the renewal is easier to pass). Then, you should reconsider yourself: are you fit, are you ready to absorb a big amount of study material?
If you pass the previously mentionned stages, just start with your PPL.
Keep in mind that you have an advantage and a disadvantage:
The advantage is your life experience and maturity.
Your disadvantage is that you are slower at learning and memorising than a 18-yo kid, and that airlines prefer fast learners because of the TR and line-training they will need to invest into you.
Cheers