setting up 75 gallon tank with driftwood

[mytell]

Hi new here. I'm trying to set up a 75 gallon. Native looking tank. I'm from Louisiana. Grew up in the country and love spending time on river and canals. I have a 29 gallon tank that I dirted I have plants I founds in my pond and local waterways. (Washed and bleach dipped)my tank has been set up for about 6 months with 3 cichild. I only added plants 3weeks ago. Any advice on 75 gallon. I have it dirted with gravel on top. I have marineland emperor 400 filtering about 3/4 full of water. I have 2 pieces of beautiful driftwood I boiled and now having trouble sinking. I need advice for sinking and setting it up looking natural with plants,rocks and my driftwood..I love Cichilds and I know they love to eat plants. Any advice? Thanks