You need to have a serious conversation with your partner about this. You shouldn't have a child until you're stable enough to support a child, let alone multiple children if you're thinking of having more than one. Also at 22, you're still very young and truly, you have more time than you might think.
However, if time really concerns you, you can't be so picky about things if you're going to be so desperate.
You need to play a part in this game. You need to actively help you and your partner stabilize financially, but the only way for that to happen is for you to get a job. You said you've had issues with this in the past. Well, employment with fast food is better than no employment at all. It's still a way to receive some kind of income. Something is better than nothing.
You can avoid employment with fast food by putting the extra effort into finding employment elsewhere. Write up a flawless resume, enlist your friends and family to refer you, make dozens of phone calls and be persistent. Persistent as all hell. Finding a job is not impossible, but if you're willing to give up on it, you're not going to get anywhere. The longer you stay unemployed, the longer this process will take.