Check your points using points calculator. You have to score 65 points or more. https://immi.homeaffairs.gov.au/help-support/tools/points-calculator Solid Plasterer is eligible for skilled visas 189/190/491. https://immi.homeaffairs.gov.au/visas/working-in-australia/skill-occupation-list
STEPS
1. SKILLS ASSESSMENT. Kailangan mo magpa assess ng skills mo sa Trades Recognition Australia. Yan yung assessing authority for your nominated occupation. Your goal is to aim a positive result. http://tradesrecognitionaustralia.gov.au/
2. ENGLISH TEST. Pag may positive result ka na, kailangan mo naman magtake ng English test. PTE or IELTS, etc up to you. Try to aim for Superior for +20 points. https://immi.homeaffairs.gov.au/help-support/meeting-our-requirements/english-language
3. EOI. Pag meron ka ng positive skills assessment + English test, pwede ka na magsubmit ng EOI (Expression of Interest). https://immi.homeaffairs.gov.au/visas/working-in-australia/skillselect
4. INVITATION. Then you wait to be invited to apply for the visa.
All the best!