u can get tourist visa by your own but it will cost you so much, so if you have friends here in doha ask them to get visa for you from some agency such as cleaopatra or fahad.
regarding job issue you can get job easily in doha and that depend on your experience but you have one strong point with you and that is you are FM and it easy for FM to get job here in doha.
for accomodation you can ask your friend to find bed space for you till you will not get job so in this way you will be not spending so much for your accomodation.
doha is safe place for everyone comparing to another GCC countries, but still you have to be carefull from bad peoples and they are everywhere in all countries.
good luck and hope you will enjoy in doha.