Wren is by far the worst company I have ever worked for. You will be given 1 week training then expected to hit the ground running.
New starters have about 3 months to become pro, if not, you will be forced to leave with no notice pay.
You are made to work 2 weeks straight with no days off. Which you won’t be paid for.
So my advice would be to avoid Wren at all costs.