Unfortunately you can't and you cant for several reasons. Firstly to lifeguard in most provinces you need to be 16 and over. Secondly the Prerequisites are: 16 years old, Bronze Cross (need not be current), and current Standard First Aid Certification. If you didn't already go and get your standard first aid it is typically a two day course . And for your NLS make sure your spinals are to standard (eggbeater, stable rollover, ect). Hope this was helpful . NLS instructor