The two chords below share a common first finger on the first fret first string. You might find it difficult to tuck your third finger up onto the third fret second string.
Some guitar players use their fourth finger instead.
Have a look at the chord diagram below and experiment with your fingering. It's a bit of a stretch but your fingers will soon get used to it. Practice changing between Dm, G7 and all the other chords then try the next exercise. This exercise uses the Dm and G7 chords as well as introducing a rhythm which reoccurs every two bars instead of every single bar as before. You may have to practice this separately until you get the hang of it.