I tired it ages ago with transit.
insurance back then because your a courier was about 150 a month.
can join courier exchange .for a monthly fee
lots of companies list jobs especially cargo2go.
you ring give em a price. but be warned these days theres a lot of people at it and compnays will haggle want things doing as cheap as possible.
I found putting adds on gum tree etc man and van was getting a fair amount of work doing tip runs helping people moving furniture plus is cash in hand .
but yeah its hard work and need to be on the ball have a brain. be organised as you have to always chase companys for payments…
if you don’t chase them up they wont pay you.
I did it for 4 years with a lwb transit but eneded up taking up a full time job offer.