I'd suggest that if you find it hard to get matched at those speeds here, you try a different "free" chess playing site that begins with the first two letters of the French word for "free" and ends with chess (not echecs).
If you do join that site and are new, you may still find it hard to get matched for a while, as many players are "scared" of playing against new players at slow time controls because of the higher likelihood of cheats. You'll also need a minimal number of games at "classic" time control before you can join tournaments, but they do have them and whole clubs for that.
At this site it seems the slowest live time control generally used is 15+10.
I am looking for members who would like to play long time control games such as 30+30 and 45+45 with me. I am looking for players in the rating range 1600+. If you are interested, please reply to this post and I will get back to you as soon as possible. Thanks!