Mkandawire made the switch to Roots Hall last week after more than a year on the sidelines with a knee injury, and made his debut in Tuesday's 3-2 win over Bristol Rovers.
"It's been a frustrating 12 months for me and it's great to be back now," he told The Echo.
"I had a knee injury and there were a few setbacks on the way back to fitness which was hard to take.
"But my knee felt fine on Tuesday which was good and I really enjoyed it. I felt fine in the first half but the second was a little tougher.
"However, that match fitness and sharpness will improve the more we play and I'm looking forward to the matches we have coming up."