There are no easy routes to success.
Look at me. I've fought and clawed to get where I am, and after a rocky 2 years I'm just a part-time ambulance guy. But it's my foot in the door. Or my buddy Jeremy, who runs a brush clearing business. He fights for it every day and it takes it's toll. Or simply look at other college students, the hours and hours we/they spend studying to pass the difficult subjects and prepare for tests. If it were easy, everyone would do it, and the bar would just be raised to another higher tier and referred to as 'success'. I
cried through 30% of the work required for my last math class. It was ******* misery; I'm not a math guy. But I did it anyway because I had to. I
cried from anxiety and fear when I first became a firefighter and found out how social you really have to be, just to function as part of the team. If I can plow through that crap and turn it in to success; if Jeremy can fight through muscle pain and swarms of bees to run his business every day, then I think you can probably do a couple weeks of book work (and probably find out what you really are capable of).
You're a few weeks away. You say you 'can' complete work, but you're failing to? That sounds like you're setting yourself up to fail, if I'm reading your statement properly. Stop being your own barricade. Fire up the steam engine of diligence and work, and make a power charge down the rails of success. You've only got a few weeks. Just buckle down and do it. If you feel like you have it hard, if you feel like you're disadvantaged somehow or like you're at the bottom of the ladder and the top is in the clouds, take a look below you. Look at the drug addicts and the people trapping themselves in dead end lives. Look at the people so depraved that they scheme to have more kids or stretch out injuries to collect welfare to scrape by. Look at the slums and the thugs that live there, never admitting that they could be any better.
That's the bottom of the ladder, my friend. You and I, we're in the middle. It's from here that we make our choice to go up or to go down. So you've tried three times and failed. I failed my driver's test twice! Do it this time. Make this the last time; don't ******* throw it away.
Try going for a run or doing some plyometrics for exercise, if you don't have an exercise program. Sometimes that helps me get motivated to do something. Gets the blood moving. You don't have much time; you simply have to do it.