Originally posted by GypsyWitch:

The easiest way is to use the Thunderstore mod manager, really easy to install mods and you can easily play vanilla as well.

Originally posted by Benevolent:

Use Thunderstore!

Here's a guide on how to get started:

https://www.youtube.com/watch?v=37ERV1RPCYo

Thanks very much for the suggestion here as it worked well and solved my problem.

Thanks also to the other replies, appreciate you all taking the time to help me. :)