How to brick up a hole in the garage

[bobski1]

Previous owner has knocked out a hole in the end of the garage to lead into the shed, unfortunately the shed has now started to leak and really needs to be taken down, however the damp is now starting to come through to the garage, some of the moving boxes are getting soft for example.

I've never done brick laying before but tempted to go with it as it doesn't need to be cosmetic or perfect just needs to block up the hole to stop the damp from coming in.

Other option is to get some big bits of wood and paint them and just screw them over the hole but would prefer to brick it up properly.

Any advice for a novice/tools to get?

I plan to start at the bottom and work my way up however I can't picture how I would put in the last few courses of bricks and ensuring there is enough cement and that they are pressed down enough.

[bobski1]

Images below, as you can see the water doesn't drain very well and before I knock down the shed I need to make sure i've bricked up the wall. With the lintel in place I'm hoping that the structure isn't going to be too much of an issue and I just need to tie it every few courses?

[bobski1]

Possibly, thought brick would be a cheaper and faster option, only used for storage as eventually I'll knock it down and make a super mega man cave but only need it to be water tight for now

Although I guess it wouldn't hurt to ask the local window fitters if they have any mis-measures I could fit it