my first runner bean plants, any tips?
Wig-wam (triangular shaped) supports are much stronger than the shape you have there, unless you have a very sheltered site. I don't!
iv only just planted the seeds straight into the ground, not got a greenhouse, so just planted them in the ground and hope for the bestm
I often sow my runner beans direct into the soil and if the weather is reasonable they seem to catch up with those that are started off inside.
As Welshonion says, you might need to strengthen your support, perhaps with some canes braced at an angle at the ends, when the beans get to the top - they can be very heavy and catch the wind. But don't worry, that won't be difficult to do.
Let us know how you get on
If they pop up before your area is frost free, it might be an idea to have some plastic bottles saved up that you can just cut up and pop over as mini cloches - but you need a hole for ventilation.