To make your adventure safe and easy I would recommend these few steps related to planning:
– You have to be swimmer and 100% familiar with boat operation = to have skills row the boat forward and backward, to be able to turn safely in a very short distance and to stop the boat quickly.
Collect most information about the chose waterway as possible = the waterway you have chosen has to be stable or with steady and calm flows (without rocks, ledges, eddies, strong current or other hazards to avoid).
– On a river, you will be better to choose a way down the stream = it´s generally much easiest and practical to go along the stream than against.
– Schedule realistic distance for each stage of your trip or tour = on water reservoir or calm water you are able to make approx. 30 km/day (intermediate) or 50 km/day (experienced) in a single rowboat. If the river flows faster, you can plan add another 20 km to your planning. Please, take into account that with bad weather, you better to reduce the distances above as it will be more difficult to row.