Star - PLA 0.2mm LH

minimal support, only to support overhang and bottom points, paint on or set to support critical regions only

Tree - PETG translucent green 0.2mm LH vase mode

No supports, Vase mode, outer brim only

Small LED tealights - https://www.amazon.co.uk/dp/B0BXPN1T3X?ref=ppx_yo2ov_dt_b_fed_asin_title or similar