from hongkong ferry terminal, what ride should i take that is less expensive and easier to go tsi sham tsui?...

For the ferry terminal, so you refer the China Ferry Terminal near the Tsim Sha Tsui Station or the Hong Kong Macau Ferry Terminal?
If you mean the China Ferry Terminal, you can easily walk to reach the Tsim Sha Tsui area directly.
If you mean the HK Macau Ferry Terminal, you can walk to reach the Central Station to take the Tsuen Wan Line to reach Tsim Sha Tsui Station.

It is good to have a Hutongxing Card, which can be used in both SZ and HK. It is refundable.
Hope the information can help you.