UK cheap greenhouse grow

My second ever grow attempt (UK grower), the first was last year and was only ok, all plants were tiny, no additional nutrients and very cheap soil so this time I have prepared a little more (nice quality soil and biobizz at the ready). I am also going to do a lot more general fruit and veg growing this year, so these will just fit in the garden nicely. I am planning on doing a few different plants this summer, I only recently bought a small green house so thought I would try germinate a little earlier than ideal because why not. The plan is to germinate in the house, grow for a couple weeks then transplant to bigger pots and move to the green house, then i will likely start a few more strains.