Took a look at the website. Below are just some preliminary thoughts
I think the template you found is a little better, and it was a smart move to get one that was already bootstrapped for presentation on mobile devices
You might want to look at the image opacity for the pics in the background. They are washing out your text and its very hard on the eyes. Check this out: https://www.w3schools.com/css/css_image_transparency.asp
There is a lot of text to read but no real content. You should have a link to a fleet page, link to your schedule tables, link to a roster, etc. I just say this since there is still very little to go off of for a prospective pilot to look at
I wouldn't list destinations in a text block like you have especially not one with just countries... Which airports to do you fly to? That could be solved by a schedules page
This is probably just me, but I wouldn't be soliciting donations with the site in the state that it is