Natural Finish: Advice Needed

Let me start by saying, I don't know anything about finishing wood. I know this is the place to get some good advice on the topic. This pic below is a good example of what I'm going for. I'm thinking of using Ash plywood and would like to keep as close to a light, natural finish as possible. I don't want to see much grain at all.
Could I get some pointers on how to achieve this? Thanks in advance!

Could I get some pointers on how to achieve this? Thanks in advance!