I will fly 6 times / year with my companion. The best priced ticket is United operated by Austrian flights Economy Light.
My companion doesn’t want to use his miles and want to give it to me all the miles and points.
With 1 round trip, i have 1260 mileage balance and 6138 premier qualifying miles x 2 (2520 and 12276).

With this economy light package i need to buy my baggage and my seat selection 100+70 euro). Can i earn a mileage plus membership with free upgrade to seat selection and 1 free baggage? How many milage balance and qualifying miles i needed?