Depends on whether you intend to have any stops. Trishaws are available at the cruise port. Price by the hour for extended sightseeing can be negotiated. Advisable to negotiate the fare first before getting on the trishaw.

Trying staying at Cheong Fatt Tze in Georgetown, its right near the night markets, the Clan Jetties, and the street vendors. Also look up Mark at Simply Enak ( find it via google ) and book a 4 hour food tour, he is amazing. Have fun.

You can go to Armenian street, there are plenty of shops to find street art reproductions