Stalling

Most learners worry about stalling.  That's perfectly understandable.  I did.  It's the "mistake" people feel is most obvious to others.
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But stalling is a safety feature.  You wouldn't want your lawnmower to keep going, if you accidentally let go of it.  Or your gas fire to stay on, if the flame went out.  It's the same with your car.

If your feet aren't quite coordinated on the pedals, the engine may run too slow (= too little gas) to cope with the work you're asking it to do (= too much clutch) when you try to move forward.

So, add some more gas (right foot down a little, on gas) … OR reduce the load on the engine (left foot down a little, on clutch).  Then the car can't stall.  But you may still feel worried.  Try not to be.  Be methodical and brisk, but don't rush.  Others will see you and plan around you while you get going again.  Then, just "shake it off".