A good start would be to make contact with your national AMSAT group such as
http://www.uk.amsat.org/ These groups have constructed and (had) launched quite a few very successful satellites. In general these support amateur radio voice and data transmission but also slow scan TV etc. etc.
There are now plans for an AMSAT mission to Mars. Quite a viable project, I believe.
Most astronauts on the ISS are also amateurs and provide an opportunity for those of us stuck on the surface a chance to talk to those fortunate to be 'up there'.
Best of luck with your plans Ahmad.
Rob