IGCSE year problem?

If you are turned 15 in July 2021, this means you are in the equivalent of UK Year 11, and if you were in a UK school you would be taking your GCSEs (or IGCSEs in your case) in summer 2022.

Anybody born between 1st September 2005 to 31st August 2006 is currently in Year 11, studying to take GCSEs in summer 2022
Anybody born between 1st September 2006 to 31st August 2007 is currently in Year 10, studying to take GCSEs in summer 2023

It sounds as though you were born in July 2006, am I correct?

This means, if you take your IGCSEs in summer 2003, you're going to be taking them a year later than usual, but it's not a big problem as you can still go to college straight after that.

Most schools do study the material over the course of 2 years though (over Years 10 and 11), so yes, if you're following the school system you should have already started studying by now if you want to take exams in summer 2023.
The good news is that it's entirely possible to catch up. If you want to get on track with the Year 11s for when you start at the independent school, start learning the syllabi now for each subject, and aim to be about half way through by the time you start school.
Get some textbooks and work your way through them.

If you are turned 15 in July 2021, this means you are in the equivalent of UK Year 11, and if you were in a UK school you would be taking your GCSEs (or IGCSEs in your case) in summer 2022.

Anybody born between 1st September 2005 to 31st August 2006 is currently in Year 11, studying to take GCSEs in summer 2022
Anybody born between 1st September 2006 to 31st August 2007 is currently in Year 10, studying to take GCSEs in summer 2023

It sounds as though you were born in July 2006, am I correct?

This means, if you take your IGCSEs in summer 2003, you're going to be taking them a year later than usual, but it's not a big problem as you can still go to college straight after that.

And since I can see even adults take IGCSE, I don't think it is going to be a big age problem. And I want to know whether I can take the test in 2024, may Or is it better for me if I take it in summer 2023 since I'm already one year late. I don't feel bad about being studying with one year less class than me.

If you were aiming to go to a state school in England then they wouldn't let you in Year 11 in September 2022 - you'd have to go to college and do whatever Level 2 courses they'd let you do. As you're aiming at an independent school then they might let you join Year 11 in September 2022 but they would be very unlikely to let you join Year 10 then as you'd be 2 years too old. I suggest you contact some independent schools to ask if they would let you join Year 11 a year late.

or will there be any possibilities to self educate, I mean to be homeschooled? but I have a doubt with self-study since nowadays they are doing access based and not exams I doubt if it is a teachers access based results the year I planned to do the IGCSE, I won't be able to get a results?

Anyone can self study at any age- - entirely on their own, by studying a distance learning course, by getting a tutor or with a combination of all 3. It's looking very unlikely that exams will be cancelled this Summer and I presume they'll also happen in 2023.

Thank you for your help. And I also want to know about this, Can I use English for second language sourcebook endorsed for 2024 examinations to sit IGCSE exam for 2023, I'm asking because I've got one or should I buy an old one?

AS I'm in the UK my knowledge of IGCSEs, particularly English as a second language, is pretty sketchy. I have no idea but the CAIE website may well summarise the differences which will help you to decide.