Sure you will get plenty of advice on this.
Bottom line, if you can wait for Emirates then do so.
Doha is not for everyone and is far more restrictive than Dubai.
You will always be a foreigner and a second class citizen in Qatar.
At end of bond you may be offered LH fleet - for a bond extension. I was and did to 340.
Command - possible in 5 years but they will have to love you and it will be 320 so lots of India trips.
And don't forget your hat or you are out.