@kilroy07 - some great advice including -
You should fly with the same throttle position. The plane (wing) doesn’t care what the wind speed is over the ground, just what’s going over it. And that’s how you see planes (RC and otherwise) flying just fine while their ground speed is zero (I’ve even seen real cubs fly backwards!).
This was my experience by accident - I started out on mode 1 and had an issue with using the left hand to drive the sticks - I am now on mode 2 and happy to have the aileron and elevator in my right hand - These days (BTW I'm still a nube) I launch the plane with enough throttle to stay airborne and then just concentrate on my right hand with a lot vocal coaxing to ensure right means right!
@kilroy07 is correct where the wind is constant in velocity or the craft are significant in size ans mass BUT even commercial aircraft can suffer from the variations in wind speed and directions from moment to moment.
My recommendation is to know your flying area and/or field and how the wind behaves and what areas are subject to turbulence and similar aberrations. At my local field there are two main wind directions when the wind is from the East the eastern perimeter is subject to severe turbulence including downdrafts and direction reversals, (especially close to the ground).
When the wind comes from the south there is general, (Field wide), turbulence but in addition there is an area where the wind is funneled between trees in a gap in the tree line. This gap, if you fly too close to it, will "Suck" your plane towards the trees especially if the plane is very light. Many newbies come to grief there! As it is again at one end of the field, (western end), it is the area where most turn into the wind to fly the upwind leg of their circuit. As you move into the wind away from the tree gap the headwind drops significantly in speed and again newbies often stall trying to not fly too fast for their abilities.
The funnel or vortex can be easily seen, (so to speak), if you fly through it as it will suddenly increase the side pressure on the vertical fin of your plane and a turn into the wind will commence. If you fight the turn and "Crab" through the high speed wind you need to be quick on the rudder or the drop in the cross-wind speed and your counteracting rudder setting could again see you parked into the trees! Another newbie trap.
My message summary is to get to know your flying area in all weathers and your planes will survive to fly another day! Yes I increase throttle to fly upwind but at our field it is a very wise thing to do especially if your plane is light and a little under-powered to start with.
Just the field I frequent!
Have fun!