Yes, thousands of students self-study. I suggest you start with ACCA resources https://www.accaglobal.com/uk/en/student/exam-support-resources/fundamentals-exams-study-resources/f6.html See in particular the "study support guide" to help get you started.
You will also find free resources here https://opentuition.com/acca/acca-taxation-tx-uk/ including an "Ask the tutor" forum.
Yes, we can do self study. I've done it for past few papers. Currently I'm also planning to take Tax UK in March. I feel it would be motivating to study together via study groups. In case you know of any whatsapp group please let me know. Feel free to contact me at email@example.com if you are interested in a study buddy.
You can surely do it. I do self study and if u plan well and act accordingly u surely will pass.
Btw I'm doing f6 self study for March 2019. If u want any help feel free to contact.