Just wondering if anyone knows the best/ quickest way to cut out images that are quite complex? Thank you in advance
You'll find lots of tutorials on that. I use gimp and some of the techniques take a bit of getting used to and I'll go back to the tutorial each time until it finally sticks (I don't do that stuff very often). A quick google came up with a good list: https://www.google.com/search?q=gimp+cut+out+image
For photography type photos, Adobe Lightroom is great. If you are talking about images, then I would stick with Adobe and try Photoshop. Both have a little learning curve, but they are very powerful. I think you can get them with Adobe Creative Cloud fairly cheap per month.