Note: osiągnąć (-nę -niesz) (pf), (impf) osiągać = to achieve, attain, accomplish
Just wanted to note that the collocation “założyć sobie dobry plan” doesn’t sound like the most natural choice here. It’s not a huge issue, but might be worth reporting so that it can be replaced with something more appropriate.
If the English phrase is “establish a plan”, I’d go for “stworzyć dobry plan” or “opracować dobry plan” in the Polish sentence.
Thanks, I’ll report it next time round.