Thank you, everyone, for your help! And thank you to those who have submitted it for acceleration - I really appreciate it!

It's still not gone through, but I'm in no huge rush, as long as it does actually go through at some point... I'll keep looking into it though and hopefully it will sort soon

I'll also have a look at the links everyone suggested!
Thanks again!
Still your transaction seems not yet confirmed bro. If it is not confirmed still you will be able to accelerate by your own. There are some transaction acceleration sites in online you can use any one of them to make the bitcoin transaction confirmed as soon as possible. Please make sure next time you are not having the cheap fees in your transaction.
If you create your own antpool sign you can do the priority acceleration in it. Please find the link to do that if you find issue again.
https://www.antpool.com/user/prioritiseTransaction.htm