Whats the least can i do for most of skin benefits

i dont want to spend alot of money on skincare or much effort either . all i need is the minimum stuff that are absolutely crucial for me and i also have these questions if you would care to answer thanks!

• is facewash important to use everyday (normal skin ) in addition to soap wash
• does dove 3 in one cut it. i use their body wash for face body and hair lol
• what is the most minimal sunscreen (if i even need one i spend most of my time in house or car.