Playing Thirds

HELLO, i have a problem playing thirds,Im trying to play in the right hand fingers 1 and 3 together ,then playing fingers 2 and 4 then 3 amd 5,all of this Im trying to play in a row,any suggestions about the technique? my fingers are stuck! Thanks

Play with only the upper voice legato. Or play with only the lower voice legato. This should begin to get your fingers unstuck, and help you to see why they got stuck in the first place. When you get some clarity with this, then play the non-legato voice a LITTLE more legato.... and so on... AFF