Starting conversion. Feel free to fling advice this direction

[Divechick]

Hello. New to this forum though have Berlin go lwb cargo van 2018 a year. Finally plucking up the courage to stop watching thousands of hours looking at YouTube videos and actually stick something to van walls and fret about linings, fittings etc. 
Feel free to advise on mistakes you made/ Things you wish you did differently/things you love and anything in between.  Gulp!!!

[Ringo2024]

Good morning & welcome aboard.