Zayn, you're off to a good start!
However for paragraph 3, instead of just talking about what subjects you're currently taking (or took) maybe you could link your subject choices to how you think they might prepare you for Pharmacy/or how they demonstrate your interest as well as how it might help you with future university work.
Eg.: I took Research as a subject, so I talked about learning the basics in this subject will help me with research projects I might do while I'm at university.
Definitely talk about Organic Chemistry! Super important!
Also another good point to add is what you intend to do with your degree (maybe you could include this in your introduction?)
The structure for my personal statement was:-why I want to study Pharmacy/become a pharmacist
-subjects I took in college
-volunteer work (I didn't have any working experience to write about, but since you do you could talk about what you learnt from each of your work experiences)
-hobbies & interests + why I wanted to study in the UK (only for international students)
I hope this helps. If you have any questions I'll try to help! Best of luck with your application & kudos to you for starting to plan this out in June, I only wrote mine in November lol.