Well, of course you haven't achieved much - you're still IN THE PROCESS OF GEARING UP to achieve much, ya daft banana. And you're ONLY 25 (- someone cancel the free bus-pass application!). And you're obviously the tortoise, not the hare. GOOD! Do you KNOW the fable and what it meant to teach you? In application from your personal point of view, it means that by the time you do qualify, you'll know everything TWICE as by-heart as those that passed first-time and will be able to recall any information far faster and - more the point - for far longer. It'll have done DEEPER. Think about it: your first name is these days unforgettable to you because of WHAT NOW?
"I'm slow but that's because I'm bloody thorough, not a rush-job surface-skimmer". That's all you need to say to yourself and others. If they're 'sowing' double then so too will what they one day reap be double... that's how sowing works. That's what you CALL value for money when remembering they're one day going to need someone THEMSELVES to lean on and help out. Who better or more likely by then than grateful and appreciative you? So as I'm sure you can now see, there is no such thing as waste and no need for any disappointment on anyone's part (not that anyone else is complaining or I'm sure you'd have mentioned it).
It's all good, you don't have a problem, you have an advantage-in-motion which just feels crappy and LIKE a problem whilst you're still in the thick of it.
Put it another way: When doing a long-distance run like the 800m (on a 4 x 200m track), which of these two runner types tends to win?
1. S/he who nigh-on or actually sprints around the first three laps?
2. S/he who takes it slower and steadier in order to reserve enough energy for that all-vital, final 100m push?
Or this way: Which drivers are the most skilled?
1. The first-time test-passer?
2. The one who re-took the course and test once or twice or more?
Just answered the question for you. You're worrying when you should be seeing farther into the looming distance and seeing the hidden benefits of being a tortoise. But certainly, pressuring yourself, this case unnecessarily, takes up vital mental processing that could instead be left available for studying, retaining and recalling. Worrying, feeling guilty and feeling like a loser despite you're still only at the- sorry, YOUR halfway-round-the-track point, is therefore futile, unproductive, and just plain nonsense/meaningless. Maybe those that are set to pass first time also went from crawling to walking faster than you as well. Who cares? You still learnt to walk in the end, didn't you? Probably talked long before they did...that's usually how it works if someone's 'slow' in one area. Your own, natural, personal schedule is what it is. Stop fighting it and wasting precious energy and enthusiasm.
Lastly but not leastly, nowadays there are THIRTY-somethings out there, whether gearing-up, still, or not, that are still living with and off the parents. So I think if you're brutally honest, either you're just being impatient *or* your worry stems from somewhere else entirely with you just blaming this course progress because it's the only 'visible' thing TO pin your disquiet onto.
(5p, please. )