How do I improve calculation
Like whole calculating the position in my head I cannot think or more than 2-3 moves, I forget the position and and where the pieces were, it causes alot of frustration, like I have an intuition of a tactic and I cannot calculate if it will work or not and due to this frustration I play a wrong move, either I miss the tactic or or I play it and then lose material, how can I improve this?