Write a little bit of code for my custom magento2 system

OK so I am a php developer but I am struggling with a simple thing in magento2 I have written a custom php app for my client and I am struggling to add some code to add a product to the cart with a custom option . Here is the code so you can see : ############ ADD SIMPLE PRODUCT NO OPTIONS if ($_GET['process'] == 'add') { $productId = $_GET['PID']; $product = $objectManager->create('\Magento\Catalog\Model\Product')->load($productId); $quoteItem = $quote->addProduct($product); $quoteItem->setQty($_GET['QTY']); //// your job is to add some code here to add the product to the quote with selected options by id !!!!! if($CP>0) { $quoteItem->setIsSuperMode(true); $quoteItem->setCustomPrice($CP); $quoteItem->setPrice($CP); $quoteItem->setFinalPrice($CP); $quoteItem->setData('price', $CP); $quoteItem->setOriginalCustomPrice($CP); } $quote->collectTotals(); $quote->save(); } Once I find someone I will give them full access to the system to work on it. If you are any good I will for sure be able to give you more work too