dont doubt yourself - trendy hand lettering. positive colorful phrase for posters or t-shirts . motivation

poster colourful print phrase lettering positive doodle typography text motivation inspirational graphic design vector sticker background font isolated children handdrawn funky colorful happy hippie hippy kids message slogan yourself doubt philosophy postcard tshirt wisdom illustration calligraphy trendy art card quote sweatshirt motto saying handwriting word type decoration greeting cartoon cute