First get a nice shape. Some people offer shapes on the marketplace that are nice and have good proportions.
https://marketplace.secondlife.com/p/AIMI-Group-Gift-January-Lauren-Skin-and-Shape/4426491 https://marketplace.secondlife.com/p/V-Torry-Shape-Full-Style-Card/4223561https://marketplace.secondlife.com/p/Shapes-of-ADAM-EVE-Aolani-Shape/6708769 https://marketplace.secondlife.com/p/z-Bodyshape-Bianca-zongtastic-gift-wear-touch-to-unpack/6053345
Some of those shapes are mod so you can change little things if you want, but make sure to keep an original copy of it in case you change it and don't like it.
For skins, I would go to the Dressing Room Fusion (Type that into SL search) they have items priced for no more than 70L and some are skins.
1L skins https://marketplace.secondlife.com/p/Swallow-Judi-and-Shelly-Skin-GIFT/6042468
Visit Lelutka, add yourself to their group (free to join) and they have a wall full of nice hairstyles as group gifts.
Clothes
https://marketplace.secondlife.com/p/BDR-Im-Your-Only-Wish-APPLIERS-UPDATE-Azz-Omega-WowMeh-Physique-and-TheMeshProject/4525259 https://marketplace.secondlife.com/p/Teefy-Lanelle-Tube-Romper-Dress/6375119 https://marketplace.secondlife.com/p/Lethal-Babydoll-Mermaid-GIFT-LINGERIE/6431879 https://marketplace.secondlife.com/p/Christine-Desings-Ankle-Boots/7241403
Mesh bodies sell for around 3K. I would recommend Maitreya, it comes with mesh hands and feet. If you don't have that money to spend with having a nice shape+skin will help.
Also remmember as being a dancer in SL sometimes personally wins over a pretty AV. Don't be that gorgeous AV dancing but too important to talk to anyone.
happy shopping