Left side is the naked wood as you buy it; right side is one coat of satin finish varnish. When it is bone dry de-nib it with one of the fine sanding things I showed you in a previous post. You must do this with every piece of wood you ever paint or varnish if you want a decent finish.
I then repeated this, i.e. a coat of varnish, an overnight dry, then de-nib. At the end of that I went over it with my favourite mid-tan shoe polish to soften the colour and to put some 'dirt' between the boards.
Here's the finished job in the children's den. I can put the doors in place when I have done the floor next door. I can fit the coving to 'tidy' the ceiling join when I've painted it. The skirting boards always need to be left until the eleventh hour because sometimes you might want a built-in cupboard or a piece of furniture that you don't want sticking away from the wall and it is a pig (like in real life) hacking out something from that or trying to hack out the skirting for a neat fit. So just be patient and be sure how much of it you want where.
Handy tip: floorboards generally run away from the doors. Not easy when you have several doors into a room. Absolutely your choice but I like them this way and I like them running across my house, not front to back.