I think Magento 2 One Page Checkout extension will be the best choice for you. This extension can boost your sales & revenue.
And I highly recommend it!
Please try the MAGENTO 2 ONE STEP CHECKOUT from Landofcoder. With 75% faster than default checkout, Magento 2 one-page checkout speeds up the whole checkout process thus considerably boosting your sales & revenue. By using Google suggestions and displaying all information on only one page, Magento 2 One-step checkout automates all shopping actions!
Try it here!