here i usually start eliminating- where things can’t be. so for example the 8 in top left can’t start in the 1x1 square, because if it did the column next to it would not start with a 2 (if that makes sense). so a cross. and just continue crossing out what the 8 can’t start. also the five on the right can’t start in the first row.
sometimes that helps to move ahead a little bit
here i usually start eliminating- where things can’t be. so for example the 8 in top left can’t start in the 1x1 square, because if it did the column next to it would not start with a 2 (if that makes sense). so a cross. and just continue crossing out what the 8 can’t start. also the five on the right can’t start in the first row. sometimes that helps to move ahead a little bit