Welcome to our community Roseline.
Regarding hospitality, can you expand on the type of experience you have in that space (Chef/waitress/restaurant manager etc?)
In relation to gardener. This does qualify for a number of Visa options however you would need to align your experience and skills with those identified in the link here: https://www.abs.gov.au/ausstats/abs%40.nsf/Product+Lookup/94FCC2AC901189BCCA257B9500131032?opendocument
Is the experience detailed aligned with your own?
If you can confirm, I’ll then be able to provide a little more information on visa options.
All the best
Mark