Hi,
I have quite a extensive experience at both photo editing, poster designs and logo designs. And I have also undertaken multiple such projects for my college events and personal friends.
For removing backgrounds on the images which you propose, I plan to use 2 basic tools provided in Photoshop, namely the Magic wand and free selection tool, the use of which varies according to the elements and detailing of the image.
I invite you to contact me, so that we can further discuss about this and to facilitate in case you need to see my work,
Regards,
Abhishek