Alwyn Crawshaw, started painting because of his TV shows decades ago. Hope to own one of his watercolours when I’m rich and Ron Ranson who made painting a simplistic endeavour but produced great paintings.
Windsor & Newton Griffin alkyd are good if you can get them or water mixable oils are good. Quicker drying than traditional. I never use rounds, a filbert on its side normally do the same job. Size 2 & 6 of both the filbert & flat normally suffice. Water mixable oils also clean up with water so no need to buy chemicals.