Here is an idea, how about saving up and paying for it yourself? You only 18, get a backup career going and save! You may not have the medical forever, and future recessions will come along for sure, just the slightest finacial hicuup and aviation enters spirals, and now we have volcanoes to deal with as well! So I think it is a pretty save bet to assume you will be laid off at one point in your career - so get a back up career to fall back on!
I have managed to bank nearly all I need within 2 years, I did get some freebies by being in the UAS and getting some hrs that way, but you can also.
Work and save for it!! You may need the loan for a type rating in the future.
Do not get a loan, staying debt free gives you more options