No worries!
Looks better, you lost those bleeds! …and I guess it was faster too!
Well basically where you want (more) detail you raise the lightmap resolution! If it’s your floor: you set it higher, if it’s one of your walls… The top is 4096! So sometimes it’s better to break up long meshes (like floor) into separate ones to get higher lightmap resolution! Also to calculate many, lower resolution lightmaps is faster than calculate 1 huge one!!
If you have ambient occlusion turned on on your postprocess (as it was mentioned before) play with it to have the best result you want!
Lighting… I can’t tell you how your project should look like! If you want a sunny daytime: sure use a directional light + skylight (or just a good HDRI can do)!
Keep in mind that any light you set to Movable won’t cause any GI!!! So if you want GI from your sky or Sun you’ll have to set it to Static/Stationary!