It’s not embarrassing, it’s that mindset that will put you off!
I started my lessons as soon as I turned 17 and it was 8 months later when I took my driving test, I failed my test and took it again a second time and then passed.
If you’re finding things difficult, then you need to keep going, you’ll only get better at things when you practice them. Everyone is different. Some people are ready to do their tests very quickly, sometimes it years for people before they’re ready to do their test!
Share your concerns with your instructor, you’re paying them to help you and teach you to drive. They’ll know your weaknesses and strengths when it comes to driving, so ask them and tell them your concerns and hopefully they’ll come up with a plan of action!
No point in rushing for your test. Only sit a test when you’re confident to some extent, otherwise there’s no point. Focus on the lessons for now then worry about the test later.