Does this need filler or just sandpaper before I paint and varnish?

[redcurrant]

Bottom of front door has had varnish worn away. The wood seems hard enough but on the fixed threshold bit there are grooves. Can this be filled with filler before painting? Or would appropriate paint be enough after sandpapering?
I'm not a DIYer but money is tight at the moment so I'm hoping I can fix this ok. Thanks for any advice.

 

[Mr diy a lot.]

All looks in good condition. A good sand and fresh paint should do it. Does not look like there are any cracks or gaps big enough requiring filler.

you’ll def be able to do this yourself and save those pennies. !

 

[redcurrant]

Great! Many thanks for prompt reply.