Try playing this its fun and addicting.
Tuning= G,D,E,A
G-5555----2222---------5555----------|
D-----5555----2222-3333----3333-5555-|
E------------------------------------|
A------------------------------------|
[ Tab from: https://www.guitartabs.cc/tabs/j/johann_pachelbel/canon_btab.html ]
You can keep playing this or you can mix it up like this(same tuning)
G-5----2-------55-------|
D---55---22-3-----3--55-|
E-----------------------|
A-----------------------|
Just for fun and to practice speed try this
G-5-2---5----|
D--5-2-3-3-5-|
E------------|
A------------|