I think being familiar progressions with would probably help...and don't worry not knowin all the chords...that a infinite amount and probably more out there waitin to be unveiled...
Now a progression are just a group of chords...Some of the primary ones are 1_4_5 , 7_3_6 , 2_5_1 (mainly used for ending a song), 7_3_6_2_5_1, and lots more but I give you examples of each one for ya..
All in C
1-4-5
C G / E G C
F C / E G A C
G D / G B D
7-3-6
D / A D E G
E / Ab C D F
A E / G B D
2-5-1
D / F A C
G G / Ab B E
C / B D E G
7-3-6-2-5-1
D / A D E G
E / Ab C D F
A E / G B D
D / F A C
G G / Ab B E
C / B D E G
IF U NEED MORE HELP LET ME KNOW..