My progress so far.

After I jumped ahead and tried to create models I started to create a model based on the mistakes and the new techniques I learnt. Although I shouldn't have jumped straight in and tried to create a model straight away, I do not regret what I did because I have learnt a lot from the mistakes I made.
I watched the series of 3D character modelling tutorial and learnt a lot of very important aspects for creating a human model.
It was very important to try keep vertices to a minimum, as this makes it easier to model as only a few vertices would have to be moved to create the shape, however if I had several which on one of my models I did, it would cause a lot of issues because most of the vertices would have to be altered in relation to the body shapes and curves I would be trying to create.
The most important thing I have learnt is using 'Quads'; modelling a character so that it has four vertices/lines for each part of the body, this also allows the body to move more naturally once animated.

A few more techniques which I learnt whilst watching tutorials;

* Connect tool - by selected a specific line, and then pressing 'loop' or 'ring' this selects the all the lines around the model, then when pressing the 'connect' tool this places a line within the lines selected, this can then be moved up or down by using the settings on the tool.

* Chamfer tool - this allowed me to not only create another vertex, it also allows the line to scale down to follow the flow of an object which decreases in size, for example an arm from top to bottom.

* Bridge and target weld - These two techniques are excellent for joining models together, I used both these techniques for joining together separate aspects of the model I created, for example hands, nose and feet. Target weld allowed me to connect singular vertices and bridge allows me to choose two edges and 'bridge' them together