Any Bricky's. Labourers, Plaster'er types out there?

If any of you have had a look at my picy's following the construction of the shed known as heaven. Then you may already be aware, I've built it stone bottom 3rd and then its block work (to be rendered) to the top.
Now its single skin with support pillars, and columns at the doorway so fingers cross the fecker wont crumble but now I'm on to the rendering of the blockwork.

Everything prior to this I've thought I'll give it a crack and see what happens if it looks ok I'll carry on. If it looks crap I'll stop and get a pro but the render is different if I get this wrong I'm proper feck'd so....

I've bought my bags of K-Rend so there is no mixing involved all the waterproofing agent and time wear and tear protection is all built in.

I've made some more gobbo and attachd the beading to the corners and fitted a drip bead around the bottom but tbh now I'm stuck...

Im not sure if I have enough of the base coat so Im wondering what goes into making the base coat because if I run out of the ready made stuff I'll no doubt save time and money on just making my own mix to finish it off.

Also do any of you have any tips or tricks for me so I can add a bit more waterproofing to the block work, if it leaks in or the blocks get damp I'll be gutted.

Cheers