Hi so I wanted to speedrun during my break, and i'm very new to this but I don't know if I can use a client like Lunar Client. Is that permitted? If not that is ok just wanted to know.

1. You should ask this in the minecraft forums or the minecraft discord, it's very unlikely that anyone here will be able to help you

2. If you read the rules for minecraft java edition, you will find out that Lunar Client is not allowed. I recommend reading the rules before you ask questions, as it usually will already be answered.

Ok, thank you, sorry for not reading that.