Installing kitchen appliances is not that difficult when you have basic electrical knowledge and if it’s the same brand replacement.
But you need to make sure that you read the installation guide completely before you get into the job. On the other hand, suppose the appliance got damaged while doing the installation, then you won’t be able to get the benefits in the manufacturer warranty.
If you’re going to install/replace a gas appliance, it is a must to have it installed and tested by a gas-safe engineer. Therefore, the best option is to get professional support from a qualified engineer and enjoy peace of mind knowing that the job is done perfectly.