How can I get bathroom idea?

Will this be the master bath? The only bath in the house?

Hi there Andrew, this article has a few thing you can consider before building your bathroom - https://blog.anchorhomes.com.au/10-things-to-consider-designing-bathroom. Best of luck and have fun

Seperate shower/tub areas;dbl sink/vanity; small walk in shower or huge dbl shower;toilet,urinal,bidet all seperate,anti-sweat valves; all tile ceiling,floors,walls; what other materials to use for walls/flooring;what tub is made of(metals,marble,ceramic,acrylic) & style of tub(jacuzzi,claw,soaker);lighting;mirrors;radiant heating in floor;windows?;all glass enclosed shower or not even enclosed;size of room; how many doors,access to bedroom,closet,hallway;faucets/fixtures-automatic on timers,rain heads,multiple heads,hands free, remotes,types of metal;towel racks/bars & where they will work best;cabinets,hardware & shelving(how many,what are they made of);sewer lines,plumbing;electric;vent pipes & exhaust fans;insulation;mold mildew prevention in walls studs;easy access to pipes in walls incase of repairs; can you get the huge tub(if you pick one)into area/up the stairs to get in bathroom;who will do everything the right way,how you want it & for best cost

If you have room for a linen closet, add one.

Think of your lifestyle so you might want a walk in shower. Perhaps a soaker tub.

Easy maintenance surfaces such as tile as much as possible.

Exhaust fan to remove moisture in the air.

Plenty of storage for personal items with drawers deep enough to hold taller items you use like hair & cleaning products.

My top picks for any bathroom reno:

• Walk-in shower with seat and two water sources - one fixed, and one with flexible hand wand (indispensable for cleaning shower walls)
• The best quality quietest exhaust fan, on timer switch
• LED lighting in ceiling, vanity, and in the shower, all on dimmer switches
• In-wall storage (some examples below)
• Pull-out trash can, and laundry hamper for dirty towels
• Automatic, soft close toilet seat lid