Reverse Macro and Stepup/down Rings

thank you for the correction about the proper spelling of LENS...

(english isn't my main languege, neither i do understand photography very well...)

as you recommend i just tried and made a close up with the 20mm reversed

just holding the lens in front wasn't very pleasing, and also the magnification was to strong for my needs

best would be to get a male-male reverse coupling ring and a secondhand lens to fit onto the 20mm

a wider lens gives me more dioptre when used reversed, with a 40mm reversed, il should get a 1:1 magnification?

when the reversed lens is just used as a "magnifying glass" can i also use an old analog lens?

thank you again for your help and the excursion into the proper spelling of lens