Magento 2 maintenance

1. Translate Phone Number = Numar de Telefon ( order - step 1 shippment ) Make condition if the client doesn't fill this field and the phone number doesn't have 10 number characters, return the eror: " Introduceti un numar de telefon valid. " 2. Make a chart rule: if the client order, above 300lei, the shipment is free Text this: Transport Gratuit pentru Comenzi mai mari de 300 RON. 3. I want to simply change the order status in-complete, we have one order, the order has ben delivered. 4. Modify, at step number 2 (verify and payment = verificare si plata) this step is next after complet shipment details, modify this: " Plata cash la livrare ", replace with " Plata Numerar la Livrare Cost suplimentar pentru procesarea platii la livrare: 5 RON " 5. Make condition if the client choose for " Plata Numerar la Livrare add extra 5 RON in the chart. Text for extra 5 RON: " Cost procesare plata la livrare 5 RON " Cost suplimentar pentru procesarea platii la livrare: 5ron " 6. Try to automatic arrange every product when click on specific categories by rating (print screen no 6) 1. Translate Phone Number = Numar de Telefon ( order - step 1 shippment ) Make condition if the client doesn't fill this field and the phone number doesn't have 10 number characters, return the eror: " Introduceti un numar de telefon valid. " 2. Make a chart rule: if the client order, above 300lei, the shipment is free Text this: Transport Gratuit pentru Comenzi mai mari de 300 RON. 3. I want to simply change the order status in-complete, we have one order, the order has ben delivered. 4. Modify, at step number 2 (verify and payment = verificare si plata) this step is next after complet shipment details, modify this: " Plata cash la livrare ", replace with " Plata Numerar la Livrare Cost suplimentar pentru procesarea platii la livrare: 5 RON " 5. Make condition if the client choose for " Plata Numerar la Livrare add extra 5 RON in the chart. Text for extra 5 RON: " Cost procesare plata la livrare 5 RON " Cost suplimentar pentru procesarea platii la livrare: 5ron " 6. Try to automatic arrange every product when click on specific categories by rating (print screen no 6)