I tested simmilar design out in KSP (although note that I don’t have the realistic flying mod installed) and added some RCS including vernier thrusters to keep it more stable.
The rcs kind of helps, but it’s still very hard to control.
So if it’s meant for space I tested out a space shuttle engine version too, and almost wrecked myself taking off
Aaaand out of fuel.
More fuel in drop tanks.
Ended up as you’d expect.