Preparing ahead for FLR

Hello guys!

I'm starting to prepare for the second stage of the visa process. My wife first entered through the spouse visa 1.5 years ago. I get anxious about these things so I thought I start preparing ahead. I spent a little while searching through the forums but couldn't find a go-to post to get the download of the process.

Can anyone share an overview of the process? with a particular focus on costs.

Lastly, any words of advice or inspiration? is it harder than the initial spouse visa process? are there high chances of it being accepted?

Much appreciated!
Thank you alll