preterite vs imperfect different meaning verbs

conocer preterite

i met for the first time

conocer imperfect

i knew/was familiar with

saber preterite

i found out/heard about

saber imperfect

i knew/ was aware

poder preterite

i succeeded/was able to and did

poder imperfect

i was able/had the chance

querer preterite

i tried/ wanted to and did

querer imperfect

i wanted to/felt like

no querer preterite

i refused /didn’t want to and didn’t

no querer imperfect

i didn’t want to (but i did)